started taking it for a possible infection. 5 days later I have h...

This registry is a place to share positive or negative side effects of using Sulfamethoxazole. If you directly experienced a side effect while using Sulfamethoxazole, then we encourage you to enter it here. Please note that entries here are the experiences of individual users, and in no way means that you or anyone else will experience the same side effect, since the same medication affects people in different ways. Please always contact your physician.
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